So how to check the OS limit ? right now I'm using server config as below: ```bash lsb_release -a ``` ```log LSB Version: :core-4.1-amd64:core-4.1-noarch Distributor ID: CentOS Description: CentOS Linux release 7.6.1810 (Core) Release: 7.6.1810 Codename: Core ``` ```bash lscpu ``` ```log Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 8 On-line CPU(s) list: 0-7 Thread(s) per core: 2 Core(s) per socket: 4 Socket(s): 1 NUMA node(s): 1 Vendor ID: GenuineIntel CPU family: 6 Model: 85 Model name: Intel(R) Xeon(R) Platinum 8163 CPU @ 2.50GHz Stepping: 4 CPU MHz: 2494.140 BogoMIPS: 4988.28 Hypervisor vendor: KVM Virtualization type: full L1d cache: 32K L1i cache: 32K L2 cache: 1024K L3 cache: 33792K NUMA node0 CPU(s): 0-7 Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch ibrs ibpb stibp fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx avx512f avx512dq rdseed adx smap avx512cd avx512bw avx512vl xsaveopt xsavec xgetbv1 spec_ctrl intel_stibp ``` ```bash lsmem ``` ```log RANGE SIZE STATE REMOVABLE BLOCK 0x0000000000000000-0x0000000057ffffff 1.4G online no 0-10 0x0000000058000000-0x000000005fffffff 128M online yes 11 0x0000000060000000-0x000000007fffffff 512M online no 12-15 0x0000000080000000-0x0000000087ffffff 128M online yes 16 0x0000000088000000-0x0000000097ffffff 256M online no 17-18 0x0000000098000000-0x000000009fffffff 128M online yes 19 0x00000000a0000000-0x00000000bfffffff 512M online no 20-23 0x0000000100000000-0x0000000187ffffff 2.1G online no 32-48 0x0000000188000000-0x000000018fffffff 128M online yes 49 0x0000000190000000-0x0000000197ffffff 128M online no 50 0x0000000198000000-0x00000001a7ffffff 256M online yes 51-52 0x00000001a8000000-0x00000002dfffffff 4.9G online no 53-91 0x00000002e0000000-0x00000002e7ffffff 128M online yes 92 0x00000002e8000000-0x000000055fffffff 9.9G online no 93-171 0x0000000560000000-0x0000000567ffffff 128M online yes 172 0x0000000568000000-0x000000064fffffff 3.6G online no 173-201 0x0000000650000000-0x0000000657ffffff 128M online yes 202 0x0000000658000000-0x000000078fffffff 4.9G online no 203-241 0x0000000790000000-0x0000000797ffffff 128M online yes 242 0x0000000798000000-0x00000007b7ffffff 512M online no 243-246 0x00000007b8000000-0x00000007bfffffff 128M online yes 247 0x00000007c0000000-0x000000083fffffff 2G online no 248-263 ```